Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1996_10_1_a9, author = {D. P Tsvetkov}, title = {Oscillations in {Linear} {Differential-Difference} {Equations}}, journal = {Mathematica balkanica}, pages = {89}, publisher = {mathdoc}, volume = {10}, number = {1}, year = {1996}, url = {http://geodesic.mathdoc.fr/item/MABA_1996_10_1_a9/} }
D. P Tsvetkov. Oscillations in Linear Differential-Difference Equations. Mathematica balkanica, Tome 10 (1996) no. 1, p. 89. http://geodesic.mathdoc.fr/item/MABA_1996_10_1_a9/